The ornamental design for a wallplanter, as shown and described.
FIG. 1 is an enlarged front, left isometric view of a wall planter of my new design oriented vertically on the horizontal sheet to show the intended positon of use;
FIG. 2 is an enlarged isometric view of the wall planter of FIG. 1 turned to show the top interior from the right;
FIG. 3 is an enlarged bottom, left isometric view, of the wall planter of FIG. 1;
FIG. 4 is a front elevation view of the wall planter of FIG. 1;